Lake of Egypt Dam
Illinois — Williamson County — SOUTH FORK SALINE RIVER
Location
| State | Illinois |
| County | Williamson |
| River | SOUTH FORK SALINE RIVER |
| Coordinates | 37.62326, -88.94671 |
Physical Characteristics
| NID Height | 55 ft |
| Dam Height | 55 ft |
| Dam Length | 2,850 ft |
| NID Storage | 82,942 acre-ft |
| Max Storage | 82,942 acre-ft |
| Surface Area | 2,265 acres |
Safety Classification
| Hazard Potential | High |
| Condition Assessment | Not Available |
| EAP Status | Yes |
| Last Inspection | November 11, 2025 |
| Inspection Frequency | 1 |
Dam Information
| Year Completed | 1962 |
| Primary Purpose | Other |
| Dam Type | Earth |
| Owner Type | Public Utility |
| Owner | SOUTHERN ILLINOIS POWER COOPERATIVE |
| Other Name | Lake of Egypt |
Location Map
About This Dam Record
Dam safety data is maintained by the Army Corps of Engineers National Inventory of Dams (NID). High-hazard dams are those where failure could cause loss of life or major property damage downstream.